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Assuming this pipe is straight, it is a cylinder. The area of a cylinder is pi*r*r*depth.

The depth is 25 feet.

25 feet is 300 inches.

The diameter is 1/2 inch, making the radius 1/4 inch.

pi*1/4*1/4*300

pi*1/16*300

pi*18.75

58.9048623

1 gallon is 231 cubic inches, so

58.9048623 / 231

0.254999404 gallons.

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12y ago

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